But any momentum is lost as Revolution midfielder Teal Bunbury lashes out at Galaxy defender Robbie Rogers near the corner flag.

Four minutes of stoppage time for someone to become a hero...

Revolution dominating possession now. Galaxy look out on their feet....

Landon Donovan tries to wriggle clear on the right, briefly giving the home crowd hope of a late twist. But he is easily dealt with by Revolution hero Chris Tierney.

Virtual silence in the StubHub Center now. The home Galaxy fans can't scarcely believe Revolution have equalised.

OptaJack:, external Revolution have won five games after trailing in MLS 2014 thus far, only Seattle won more (6).

Galaxy fans - you have been warned.

Neat Revolution hog possession as they probe for an opening. Then, it arrives out of nothing. Teal Bunbury is unmarked on the far side of the box, digging out a lob wedge of a chip over a stranded Jaime Penedo. But to Galaxy's relief it bounces back off the crossbar!

Revolution press again. The visitors win a free-kick in a promising position on the right, swung in towards Joss Goncalves at the back stick. But the Portuguese defender's shot lacks the power to trouble Galaxy keeper Jaime Penedo.

Image source, Reuters

Ten minutes for another twist. Anyone betting against Landon Donovan nabbing a late winner?

You wanted late drama. You've got late drama! Chris Tierney - Revolution's longest-serving player - pops up in the Galaxy box to steer in from close range. Substitute Patrick Mullins, who came on moments earlier, provided the killer pass.

Image source, Reuters

Fifteen minutes for Galaxy to hang on to their lead from Gyasi Zardes's goal. Fifteen minutes for Revolution to salvage something.

OptaJack:, external Five of the last seven MLS goals that LA have conceded have been in the 69th minute or later. Revolution have scored a goal in the 70th minute or later in each of their four playoff games thus far in MLS 2014.

Do. Not. Move. Late drama ahead - surely?!

And then seconds later, Robbie Keane and Galaxy are almost punished. Revolution man Kelyn Rowe finds a yard of space on the periphery of the Galaxy box, curling a effort agonisingly wide of the goal.

Here is Landon Donovan's chance to crown his career with a decisive MLS Cup goal. The Galaxy forward waits for team-mate Robbie Keane to square the ball for what would seem to be a certain goal - but the Irishman decides to go solo. That allows Revolution keeper Bobby Shuttleworth to block with his feet. Donovan goes loco.

Landon Donovan may be well on his way to a winning end, but it is not quite been the fairytale he would have envisaged in his dreams last night.

The 32-year-old US record goalscorer has been pretty anonymous, but then appears to drill a tame shot straight at Revolution keeper Bobby Shuttleworth.

Richard Padula
BBC World Service Sport at the StubHub Center

"I think the security guard beside me is the only person here who wasn't aware that Landon Donovan is retiring. It may be Donovan's last game, but Robbie Keane was a bit spiky when one journalist asked him about his own retirement. Clearly something the Irishman doesn't want to think about now."

Another chance for Galaxy, another chance for Gyasi Zardes. The man in on fire. But the Revolution defence regroup to charge down his shot from 15 yards.

It has been a tough second half for the Revolution defence - not least for Andrew Farrell who has been led a merry dance by Galaxy goalscorer Gyasi Zardes.

The Revolution right-back is shown a yellow card for cynically stopping Zardes in his tracks.

Another burst from Gyasi Zardes into the Revolution box creates an opening for Galaxy, although his final ball is not at the same quality as his approach play. Revolution midfielder Jermaine Jones nonchalantly clears with a calm backheel.

Revolution head coach Jay Heaps is not a man to hang about. Zardes' goal prompts an instant change for the Revolution - Japanese midfielder Daigo Kobayashi replaces Scott Caldwell (who is not related to Steve or Gary).

Revolution clinging on for dear life at the moment. Gyasi Zardes is the man of the moment, breaking down the left flank at every opportunity. Revolution manage to clear from their own penalty area.